package org.bouncycastle.asn1.x509;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERObject;
import org.bouncycastle.asn1.DERSequence;

public class CRLDistPoint extends ASN1Encodable {
    ASN1Sequence seq = null;

    public static CRLDistPoint getInstance(ASN1TaggedObject obj,
            boolean explicit) {
        return getInstance(ASN1Sequence.getInstance(obj, explicit));
    }

    public static CRLDistPoint getInstance(Object obj) {
        if (obj instanceof CRLDistPoint || obj == null) {
            return (CRLDistPoint) obj;
        } else if (obj instanceof ASN1Sequence) {
            return new CRLDistPoint((ASN1Sequence) obj);
        }

        throw new IllegalArgumentException("unknown object in factory: "
                + obj.getClass().getName());
    }

    public CRLDistPoint(ASN1Sequence seq) {
        this.seq = seq;
    }

    public CRLDistPoint(DistributionPoint[] points) {
        ASN1EncodableVector v = new ASN1EncodableVector();

        for (int i = 0; i != points.length; i++) {
            v.add(points[i]);
        }

        seq = new DERSequence(v);
    }

    /**
     * Return the distribution points making up the sequence.
     * 
     * @return DistributionPoint[]
     */
    public DistributionPoint[] getDistributionPoints() {
        DistributionPoint[] dp = new DistributionPoint[seq.size()];

        for (int i = 0; i != seq.size(); i++) {
            dp[i] = DistributionPoint.getInstance(seq.getObjectAt(i));
        }

        return dp;
    }

    /**
     * Produce an object suitable for an ASN1OutputStream.
     * 
     * <pre>
     * CRLDistPoint ::= SEQUENCE SIZE {1..MAX} OF DistributionPoint
     * </pre>
     */
    public DERObject toASN1Object() {
        return seq;
    }

    public String toString() {
        StringBuffer buf = new StringBuffer();
        String sep = System.getProperty("line.separator");

        buf.append("CRLDistPoint:");
        buf.append(sep);
        DistributionPoint dp[] = getDistributionPoints();
        for (int i = 0; i != dp.length; i++) {
            buf.append("    ");
            buf.append(dp[i]);
            buf.append(sep);
        }
        return buf.toString();
    }
}
